diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 78a89c905d6e..db9030fd8b88 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -2702,7 +2702,7 @@ let
   botan = callPackage ../development/libraries/botan { };
 
   box2d = callPackage ../development/libraries/box2d { };
-  box2d = callPackage ../development/libraries/box2d/2.0.1.nix { };
+  box2d_2_0_1 = callPackage ../development/libraries/box2d/2.0.1.nix { };
 
   buddy = callPackage ../development/libraries/buddy { };